Study on Fuzzy-PID control for SM-CVT speed ratio based on PSO algorithm

摘要

This paper puts forward a speed ratio control bychanging the diameter of the Continuously Variable Transmission primary andsecondary pulley with a single motor actuation system. The structuralcomponents and working principle of this actuation system are introduced. Acontrol strategy based on Fuzzy-PID is proposed to improve the controlprecision of the nonlinear and solve problems such as the time lag andinstability of Continuously Variable Transmission speed ratio controlsystem. Fuzzy-PID speed ratio controller model is set up, in which parameterfactors are optimized by the Particle Swarm Optimization algorithm torealize the optimization of the speed ratio control system. Simulationresults show that the Fuzzy-PID controller optimized by Particle SwarmOptimization algorithm can improve the control precision of system and theperformance of the speed ratio tracking.